EXHIBIT 10 Washington Trust Bancorp, Inc. Third Amendment to The Washington Trust Company Nonqualified Deferred Compensation Plan A. WHEREAS, The Washington Trust Company (the "Company") maintains The Washington Trust Company Nonqualified Deferred Compensation Plan (the "Plan"), consisting of the Plan document, Adoption Agreement for The Washington Trust Company Nonqualified Deferred Compensation Plan (hereinafter the "Adoption Agreement") and Appendices A, B, C and D thereto, for the benefit of its eligible employees and directors; and WHEREAS, the Company desires to amend the Plan; and WHEREAS, the Company has reserved the right to amend the Plan by action of its Board of Directors; and WHEREAS, the Board of Directors of the Company has authorized the following amendment to the Plan; NOW, THEREFORE, the Company hereby amends the Plan as follows: 1. The Adoption Agreement is hereby amended by deleting in Section VIII reference to the "Compensation and Benefits Committee of the Board of Directors of the Company" and replacing it with the "Compensation and Human Resources Committee of the Board of Directors of the Company." 2. Appendix C is hereby amended by adding the following at the end thereof: 13. Royce Total Return Fund 14. Columbia Acorn USA Fund 15. Barclays Global Investors S&P 500 Stock Fund" B. The effective date of this Amendment is January 1, 2004. C. Except as amended above, the Plan remains in full force and effect and is in all other respects ratified and confirmed. IN WITNESS WHEREOF, the Company has caused this Amendment to be executed this 1st day of March, 2004. THE WASHINGTON TRUST COMPANY By: John C. Warren ------------------------------------ John C. Warren Chairman and Chief Executive Officer